Question

the sum of the digit of 2 ind the original number is 9. the number formed by revising the digits is 45 more than the original number. find the original number

Answer 1

Answer:

x+y=9

10x+y+45=10y+x

9x-9y=-45

x-y=5

x+y=9

x-y=5

2y=14

y=7

x=2

Number =27